129242018918 has 36 divisors (see below), whose sum is σ = 211450910580. Its totient is φ = 59079479760.

The previous prime is 129242018909. The next prime is 129242018923. The reversal of 129242018918 is 819810242921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 64266533 + ... + 64268543.

It is an arithmetic number, because the mean of its divisors is an integer number (5873636405).

Almost surely, 2^129242018918 is an apocalyptic number.

129242018918 is a deficient number, since it is larger than the sum of its proper divisors (82208891662).

129242018918 is an frugal number, since it uses more digits than its factorization.

129242018918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4101 (or 2061 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 47.

The spelling of 129242018918 in words is "one hundred twenty-nine billion, two hundred forty-two million, eighteen thousand, nine hundred eighteen".